body {
    padding: 0;
    margin: 0;
}

.blurDiv {
    width: 761px;
    height: 448px;
    margin: 50px auto 0;
    position: relative;
}

.blurImg {
    width: 761px;
    height: 448px;
}


/*设置按钮效果*/

a {
    display: block;
    width: 240px;
    height: 60px;
    border-radius: 5px;
    line-height: 60px;
    text-align: center;
    position: absolute;
    top: 105%;
    font-size: 1.5em;
    color: #fff;
    text-decoration: none;
}

#buttonReset {
    left: 7%;
    background-color: aqua;
}

#buttonShow {
    right: 7%;
    background-color: rgb(185, 243, 185);
}

#buttonReset:hover {
    background-color: yellow;
}

#buttonShow:hover {
    background-color: yellow;
}

.blurImg {
    width: 761px;
    height: 448px;
    filter: blur(20px);
}

#canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 761px;
    height: 448px;
}